Dredging apparatus



' (No Model.)

A. B. BOWERS. 'DRBDGING APPARATUS.

Patented May 31, 1887.]

N. PETERS. Hum-Lithographer. Walhinflun. D C

. UNITED STATES A PATENT OF ICE.

ALPHONZO B. BOWERS, OF SAN FRANCISCO, CALIFORNIA.

DREDGING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 364,158, dated May 3l, 1887.

Original application filed December 9, 1876. Renewed April 16, 1879. Divided and this application filed February 26,187.

Serial No. 529,025. (No model.) i

To all whom it may concern/. A

Be it known that I, ALPHoNzo B. BOWERS,

of San Francisco, California, civil engineer,

have invented a novel Device for Dredging, which is herein set forth, with details of construction, by reference to the accompanying drawings.

It is asixth division of the application filed by me December 9, 1 876, and renewed April 16,1879, being portions thereof shown in Figures 10 and 17 of the original drawings. 7

It consists, mostly,in a hollow, and usually a rotary, shell mountedon suitable bearings and provided with excavating devices placed over openings in said shell through which the spoil passesfrom said devices to the interior of the shell and to apipe for removingthe spoil; also, in arranging theopenings and excavating devices spirally around the shell to make at least one full cut across the whole face of the excavation at each revolution; also, in arranging the openings and excavating devices in reversed spirals around said shell to produce an even-balanced strain and avoid the rocking of the hull caused by devices set in a single spiral from end to end of a long transverse cylinder, such as is sometimes used, and herein shown,'for cutting the full width of the hull; also,.in the combination. with this excavator, of means of rotating it and of freeing it from spoil and of dividing the spoil between the several discharging-orifices.

Fig. 1 isa plan of one form of this apparatus -and of a portion of a hull on which it and its actuating mechanism may be mounted. Fig. 2 is a side view thereof. Fig. 3 is a longitudinal section through the upper elbow of asuction-pipe leading from the excavator through a bearing in the side of the vessel to a gland connecting it with the suction of a pump. This figure also shows the journal on which rotates the drivingwheel of the chain 7. Fig. 4 is a perspective of a cylindrical shell with its peripheral buckets and openings used in making a wide cut across the full width of the hull, as shown in Fig. 1. Fig. 5 shows the lower elbows of the suction-pipes leading from the pumps to the interior of the excavator, and between these elbows is shown one form of a bearing or support on which the excavator may be mounted and around which it may be revolved. v i

A is a portion of a floating vessel on which the excavating, discharging, and actuating mechanism may be mounted. n

B B are large pumps for relieving the ex- I cavator of spoil and for transporting and discharging the same.

O O are suction-pipes leading from the pumps to the interior of the excavator.

O is a discharge-pipe.

D is any suitable bearing for supporting the excavator and serving as a journal or axle on which said excavator may be revolved. It is here shown as a hollow chamber passing through the excavator from elbow to elbow of the suction-pipes, to each of which it is secured. As here shown, it is provided with a longitudinal slot from end to end of the excavator for receiving the spoil therefrom and a central division, q, forming two chambers for equally dividing said spoil between the two suction-pipes, as shown in Fig. 17 of the original drawings; but when one suction-pipe only is used this central division must be either omitted or both chambcrsbe provided with separate connections with the suctionpipe. The bearing here shown is madein two equal parts,with outside flanges on their outer ends to secure them to the lower elbows of the suctioirpipes and with inside fastenings for securing their inner ends together at q. When this mode of mounting the excavator is used it makes a strong connection between the lower ends of the suction-pipes, prevents the admis- 85 sion of too large a percentage of water, and, for a long excavator discharging at both ends,

is, perhaps, the best possible form;

E is an excavator. It is here shownas a rotary cylinder or drum, preferably made of steel plates riveted together, and provided with buckets securely fastened over suitable openings in said cylinder or drum, through which. the spoil passes from said buckets to the interior of the drum and, in the construction shown, to the interior of the chambers DD. It is here shown with a double series of six openings and buckets arranged in reversed spirals from the center to the ends, as numbered in, Figs. 1, 2, 4, and passing once around ICC i any suitable manner.

cavatorwith an endless drivingchain, the

same being claimed in another division of the original application; but

\Vhat I do claim is-..-

1. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices, openings for admitting spoil from said devices to the interior of said cylinder or drum, and apipe for receiving and transporting said spoil.

2. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices, openings foradmitting spoil from said devices to the interior of said cylinder or drum, and a suction-pipe for receiving and removing said spoil.

3. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices, openings for admitting spoil from said devices to the interior of said cylinder or drum, and an inner hollow cylinder, drum, or shell, having openings for receiving and discharging said spoil.

4. Arotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices, openings for admitting spoil from said devices to the interior of said cylinder or drum, and an inner hollow chamber having openings for receiving and emitting and a pipe for discharging said spoil.

5. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices, openings for admitting spoil from said devices to the interior of said cylininder or drum, and an inner hollow chamber having openings for receiving and emitting and a suction-pipe for removing said spoil.

6. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices spirally arranged around said drum, with openings for admitting spoil from said devices to the interior of said cylinder or drum, and apipe for receiving and transporting said spoil.

7. Arotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices spirally arranged around said drum, with openings for admitting spoil from said devices to the interior of said cylinder or drum, and a suction-pipe for receiving and removing said spoil.

8. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices spirally arranged around said drum, with openings for admitting sp'oil from said devices to the interior of said cylinder or drum, and an inner hollow cylinder, shell, or drum having openings for receiving and discharging spoil.

9. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral ex cavating devices spirally arranged around said cylinder or drum, openings for admittingspoil from said devices to the interior of the drum, and an inner hollow chamber having openings for receiving and emitting and a pipe for dis charging said spoil.

10. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices spirally arranged around said cylinder or drum, openings for admitting spoil from said devices to the interior of the drum, and an inner hollow chamber having openings for receiving and emitting and a suction-pipe for withdrawing said spoil.

11. A rotary excavator consisting of a hollow cylinder, or drum provided with peripheral excavating devices arranged in-reversed spirals from the centertoward the ends of said cylinder, openings for admitting spoil from said devices to the interior of said drum, and a pipe for receiving and transporting said spoil.

12. A rotary excavator consisting of a hollow cylinder or drum. provided with peripheral excavating devices arranged in reversed spirals from the center toward the ends of said cylinder or drum openings for admitting spoil from said devices to the interior of said cylinder or drum, and a suction-pipe for receiving and conveying said spoil.

' 13. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices arranged in reversed spirals from the center toward the ends of said cylinder, openings for admitting spoil from said devices to the interior of said drum, and

an inner hollow cylinder or chamber having openings for receiving and discharging spoil.

let. A rotary excavator consisting of a hollow cylinder or drumprovided with peripheral excavating devices arranged in reversed spirals from the center toward the ends of said cylinder, openings for admitting spoil from said devices to the interior of said cylinder, and an inner hollow cylinder or chamberhaving openings for receiving and emitting and a pipe for discharging said spoil.

15. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral excavating devices arranged in reversed spirals from the center toward the ends of said cylinder or drum, openings for admitting spoil from said devices to the interior of said cylinder or drum, and an inner hollow chamber having openings for receiving and emitting and a suction-pipe for removing said spoil.

. 16. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral buckets or scoops secured thereto over openings foradmitting spoil from said buckets I a suction-pipe for receiving and conveying said spoil. I

18. A rotary excavator consisting of a hollow cylinder or drum provided wit-h peripheral buckets or scoops secured thereto over openings for admitting spoil from said buckets or scoops to the interior of the cylinder and an innerhollow cylinder, shell, or drum having openings for receiving and discharging spoil.

19. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral buckets or scoops secured over openings for admitting spoil from said buckets orscoops to the interior of said cylinder or drum and an inner hollow chamber having openings for receiving and emitting and a pipe for discharging the spoil.

20. A rotary excavator consisting of ahollow cylinder or drum provided with peripheral buckets or scoops secured over openings for admitting spoil from said buckets or scoops to the interior of said cylinder or drum and an inner hollow chamber having openings for receiving and emitting and a suction-pipe for discharging spoil.

21. A rotary excavator consisting of a hollow cylinder provided with peripheral buckets or scoops arranged in reversed spirals over openings for admitting spoil from said buckets or scoops to the interior of said cylinder and a pipe for receiving and removing the spoil.

22. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral buckets or scoops arranged in reversed spirals over openings for admitting spoilfrom said buckets or scoops to the interior of said cylinder or drum and a suction-pipe for receiving and removing the spoil.

23. A rotary excavator consisting of a hollow cylinder provided with peripheral buckets arranged in reversed spirals over openings for admitting spoil from said buckets to the interior of said cylinder and an inner hollow cylinder, shell, or drum having openings for receiving and discharging spoil.

24.. A rotary excavator consisting of a hollow cylinder or drum provided with peripheral buckets or scoops arranged in reversed spirals over openings for admitting spoil from said buckets or scoops to the interior of said cylinder or drum and an interior hollow cylinder, shell, or drum having openings for receiving and emitting and a pipe for removing the spoil.

ing openings for receiving and emitting'and a suction-pipe for removing the spoil.

26. A rotary excavator with inward delivery, in combination with two or more interior chambers, each of said chambers having openings for receiving and dischargingspoil.

'27. A rotary excavator having peripheral excavating devices With inward delivery, in combination with two or moreinterior chambers, each of said chambers having openings for receiving and discharging spoil.

28. A rotary excavator with inward delivery through itself into an interior hollow chamber, cylinder, or drum provided with an opening to admit spoil to the interior of said chamber, cylinder, or drum, and a central division to divide the spoil between the openings in said chamber, cylinder, or drum.

29. A hollow cutting, digging, or scooping excavator with inward delivery through itself provided with more than one suction-pipe for removing and a device for dividing the spoil between said pipes. p

30. A hollow rotary excavator with inward delivery through itself provided with more than one suction-pipe for removing and a de-v vice for dividing the spoil between said pipes.

31. A rotary excavator provided with aseries of peripheralexcavating-buckets arranged in reversed spirals around the face of said cxcavator.

32. A rotary excavator with inward delivery through itself, and provided with one or more series of excavating devices, each device constructed and arranged to out only a part of the breast against which said excavator is working, but unitedly to make at least one full cut across the whole face of the excavation at each revolution, in combination with a conduit for discharging the spoil.

33. A rotary excavator with inward delivery through itself, and provided with one or cut across the whole face of the excavation at.

each revolution, in combination with a dredgeboat and a device for actuating said excavator.

35. A rotary excavator with inward delivery through itself, and provided with one or IIO more series of excavating-buckets, each bucket constructed and arranged to out only a part of the breast against which said excavator is working, but united] y to make at least one full cut across the whole face of the excavation at each revolution, in combination with a dredgeseries of excavating-buckets, each bucket constructed and arranged to cut only a part of the breast against which said excavator is working, but unitedly to make at least one full cut across the whole face of the excavation at each revolution, in combination with a suction-pipe for removing the spoil.

In witness whereof I hereunto affix my signature in the presence of two witnesses.

A. B. BOWERS. Witnesses:

W. A. BARTLETT, E. H. EAKLE. 

